Power Supply Wiring - Mitsubishi Electric CITY MULTI PLFY-P NFMU-E Serie Manual De Instalación

4. Electrical work
A B
~208/230V
A
~208/230V
Fig. 4-7
Total operating current of the indoor
unit
F0 = 16 A or less *2
F0 = 25 A or less *2
F0 = 32 A or less *2
Apply to IEC61000-3-3 about max. permissive system impedance.
*1 The Ground-fault interrupter should support inverter circuit.
The Ground-fault interrupter should combine using of local switch or wiring breaker.
*2 Please take the larger of F1 or F2 as the value for F0.
F1 = Total operating maximum current of the indoor units × 1.2
F2 = {V1 × (Quantity of Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Type3)/C} + {V1 × (Quantity of Others)/C}
Indoor unit
PLFY-NEMU, PMFY-NBMU, PEFY-NMSU,
Type 1
PCFY-NKMU, PKFY-NHMU, PKFY-NKMU, PLFY-NFMU
Type 2 PEFY-NMAU
Type 3 PEFY-NMHSU
Others Other indoor unit
C : Multiple of tripping current at tripping time 0.01 s
Please pick up "C" from the tripping characteristic of the breaker.
<Example of "F2" calculation>
• Condition PEFY-NMSU × 4 + PEFY-NMAU × 1, C = 8 (refer to right sample chart)
F2 = 19.8 × 4/8 + 38 × 1/8
= 14.65
→ 16 A breaker (Tripping current = 8 × 16 A at 0.01 s)
*3 Current sensitivity is calculated using the following formula.
G1 = V2 × (Quantity of Type1) + V2 × (Quantity of Type2) + V2 × (Quantity of Type3) + V2 × (Quantity of Others)
+ V3 × (Wire length[km])
G1 Current sensitivity
30 or less 30 mA 0.1 sec or less
100 or less 100 mA 0.1 sec or less
Wire thickness
2
1.5 mm , AWG14
2
2.5 mm , AWG13
2
4.0 mm , AWG11
8
D
C C C C C
B D
L1 L2 M1 M2 S 1 2
C
TB2 TB5 TB15
Minimum wire thickness (mm², AWG.No)
Main cable Branch
1.5, AWG14 1.5, AWG14
2.5, AWG13 2.5, AWG13
4.0, AWG11 4.0, AWG11
V1
19.8
38
13.8
V3
48
56
66

4.2. Power supply wiring

• Wiring size must comply with the applicable local and national codes.
• Power supply cable of appliance shall not be lighter than design 245 IEC 53 or 227
IEC57, 245 IEC 53 or 227 IEC 53.
• Install an earth line longer than other cables.
• A switch with at least 3 mm, 1/8 inch contact separation in each pole shall be
provided by the air conditioner installation.
[Fig. 4-7]
Ground-fault interrupter
A
Local switch/Wiring breaker
B
Indoor unit
C
Pull box
D
Warning:
Never splice the power cable or the indoor-outdoor connection cable,
otherwise it may result in a smoke, a fire or communication failure.
Ground-fault interrupter *1
Ground
1.5, AWG14 20 A current sensitivity *3
2.5, AWG13 30 A current sensitivity *3
4.0, AWG11 40 A current sensitivity *3
V2
2.4
1.6
4.8
0 0
Local switch (A) Breaker for wiring
(NFB)
Capacity Fuse
16 16
25 25
32 32
Sample chart
6000
600
SAMPLE
60
10
1
0.1
0.01
1 2 3 4 6 8
C
Rated Tripping current (x)
20
30
40
10 20